Originally Posted by kronos
snip..... Between this truck and my previous one I have logged around 3k miles hauling this trailer without a wdh and have yet to feel any kind of wobble........snip
The main function of a WDH is to "maintain" the proper weight on the front suspension of the TV while towing. As TT tongue weight is added to the TV's hitch ball, weight is added to the TV's rear axle and at the same time weight is removed from the TV's front axle. The heavier the tongue weight, the more weight is removed from the TV's front suspension......, and proper/safe TV handling of any TT is dependent on the integrity of the TV's front suspension.
In cases where a WDH is required but not installed, the weight on a TV's front axle can fluctuate while in tow, not a good condition in itself and is amplified if to much weight was removed in it's static condition.
One's TV owners manual will identify the condition that the front suspension should be when towing...., in most cases it is recommended that the TV's front suspension should maintain the same weight hitched as unhitched for ideal handling.
Visting a CAT scale under TV/TT loaded conditions will eliminate all the guess work, and tell you everything you need to know; if a WDH is required, is a WDH properly sized/adjusted, all TV/TT weights, proper loaded tongue weight (13% to 15%), etc..
CAT scale how-to: http://www.jaycoowners.com/forums/f37/how-to-weigh-your-tv-tt-3871.html